Adolphin jumped from 5 feet below the surface of the sea. jane wrote −5 to represent the depth from which the dolphin jumped. what does 0 represent in this situation?
the floor of the sea
the surface of the sea
the level to which the dolphin jumped
the level from which the dolphin jumped

15 points ! ~ see if you know the answer to both you!

Scores on the cognitive scale of the bayley-scales of infant and toddler development range from 1 to 19, with a standard deviation of 3. calculate the margin of error in estimating the true mean cognitive scale score, with 99% confidence, if there are 12 infants and toddlers in a sample.

Prove the converse of the pythagorean theorem using similar triangles. the converse of the pythagorean theorem states that when the sum of the squares of the lengths of the legs of the triangle equals the squares length of the hypotenuse, the triangle is a right triangle. be sure to create and name the appropriate geometric figures.